diff --git a/docs/getting_started_files.md b/docs/getting_started_files.md
index 68dc7dba..0c621968 100644
--- a/docs/getting_started_files.md
+++ b/docs/getting_started_files.md
@@ -96,6 +96,7 @@ Now:
 *   **application/vnd.rar** (.rar)
 *   **application/zip** (.zip)
 *   **application/x-7z-compressed** (.7z)
+*   **application/gzip** (.gz)
 
 Although some support is imperfect for the complicated filetypes. For the Windows and Linux built releases, hydrus now embeds an MPV player for video, audio and gifs, which provides smooth playback and audio, but some other environments may not support MPV and so will default when possible to the native hydrus software renderer, which does not support audio. When something does not render how you want, right-clicking on its thumbnail presents the option 'open externally', which will open the file in the appropriate default program (e.g. ACDSee, VLC).
 
diff --git a/hydrus/core/HydrusConstants.py b/hydrus/core/HydrusConstants.py
index 78cfca77..ca3c9838 100644
--- a/hydrus/core/HydrusConstants.py
+++ b/hydrus/core/HydrusConstants.py
@@ -717,12 +717,13 @@ APPLICATION_SAI2 = 54
 APPLICATION_KRITA = 55
 IMAGE_SVG = 56
 APPLICATION_XCF = 57
+APPLICATION_GZIP = 58
 APPLICATION_OCTET_STREAM = 100
 APPLICATION_UNKNOWN = 101
 
 GENERAL_FILETYPES = { GENERAL_APPLICATION, GENERAL_AUDIO, GENERAL_IMAGE, GENERAL_VIDEO, GENERAL_ANIMATION }
 
-SEARCHABLE_MIMES = { IMAGE_JPEG, IMAGE_PNG, IMAGE_APNG, IMAGE_GIF, IMAGE_WEBP, IMAGE_TIFF, IMAGE_ICON, IMAGE_SVG, APPLICATION_FLASH, VIDEO_AVI, VIDEO_FLV, VIDEO_MOV, VIDEO_MP4, VIDEO_MKV, VIDEO_REALMEDIA, VIDEO_WEBM, VIDEO_OGV, VIDEO_MPEG, APPLICATION_CLIP, APPLICATION_PSD, APPLICATION_SAI2, APPLICATION_KRITA, APPLICATION_XCF, APPLICATION_PDF, APPLICATION_ZIP, APPLICATION_RAR, APPLICATION_7Z, AUDIO_M4A, AUDIO_MP3, AUDIO_REALMEDIA, AUDIO_OGG, AUDIO_FLAC, AUDIO_WAVE, AUDIO_TRUEAUDIO, AUDIO_WMA, VIDEO_WMV, AUDIO_MKV, AUDIO_MP4, AUDIO_WAVPACK }
+SEARCHABLE_MIMES = { IMAGE_JPEG, IMAGE_PNG, IMAGE_APNG, IMAGE_GIF, IMAGE_WEBP, IMAGE_TIFF, IMAGE_ICON, IMAGE_SVG, APPLICATION_FLASH, VIDEO_AVI, VIDEO_FLV, VIDEO_MOV, VIDEO_MP4, VIDEO_MKV, VIDEO_REALMEDIA, VIDEO_WEBM, VIDEO_OGV, VIDEO_MPEG, APPLICATION_CLIP, APPLICATION_PSD, APPLICATION_SAI2, APPLICATION_KRITA, APPLICATION_XCF, APPLICATION_PDF, APPLICATION_ZIP, APPLICATION_RAR, APPLICATION_7Z, APPLICATION_GZIP, AUDIO_M4A, AUDIO_MP3, AUDIO_REALMEDIA, AUDIO_OGG, AUDIO_FLAC, AUDIO_WAVE, AUDIO_TRUEAUDIO, AUDIO_WMA, VIDEO_WMV, AUDIO_MKV, AUDIO_MP4, AUDIO_WAVPACK }
 
 STORABLE_MIMES = set( SEARCHABLE_MIMES ).union( { APPLICATION_HYDRUS_UPDATE_CONTENT, APPLICATION_HYDRUS_UPDATE_DEFINITIONS } )
 
@@ -738,7 +739,7 @@ AUDIO = { AUDIO_M4A, AUDIO_MP3, AUDIO_OGG, AUDIO_FLAC, AUDIO_WAVE, AUDIO_WMA, AU
 
 VIDEO = { VIDEO_AVI, VIDEO_FLV, VIDEO_MOV, VIDEO_MP4, VIDEO_WMV, VIDEO_MKV, VIDEO_REALMEDIA, VIDEO_WEBM, VIDEO_OGV, VIDEO_MPEG }
 
-APPLICATIONS = { IMAGE_SVG, APPLICATION_FLASH, APPLICATION_PSD, APPLICATION_CLIP, APPLICATION_SAI2, APPLICATION_KRITA, APPLICATION_XCF, APPLICATION_PDF, APPLICATION_ZIP, APPLICATION_RAR, APPLICATION_7Z }
+APPLICATIONS = { IMAGE_SVG, APPLICATION_FLASH, APPLICATION_PSD, APPLICATION_CLIP, APPLICATION_SAI2, APPLICATION_KRITA, APPLICATION_XCF, APPLICATION_PDF, APPLICATION_ZIP, APPLICATION_RAR, APPLICATION_7Z, APPLICATION_ZIP }
 
 general_mimetypes_to_mime_groups = {
     GENERAL_APPLICATION : APPLICATIONS,
@@ -761,7 +762,7 @@ for ( general_mime_type, mimes_in_type ) in general_mimetypes_to_mime_groups.ite
 MIMES_THAT_DEFINITELY_HAVE_AUDIO = tuple( [ APPLICATION_FLASH ] + list( AUDIO ) )
 MIMES_THAT_MAY_HAVE_AUDIO = tuple( list( MIMES_THAT_DEFINITELY_HAVE_AUDIO ) + list( VIDEO ) )
 
-ARCHIVES = { APPLICATION_ZIP, APPLICATION_HYDRUS_ENCRYPTED_ZIP, APPLICATION_RAR, APPLICATION_7Z }
+ARCHIVES = { APPLICATION_ZIP, APPLICATION_HYDRUS_ENCRYPTED_ZIP, APPLICATION_RAR, APPLICATION_7Z, APPLICATION_GZIP }
 
 MIMES_WITH_THUMBNAILS = set( IMAGES ).union( ANIMATIONS ).union( VIDEO ).union( { IMAGE_SVG, APPLICATION_FLASH, APPLICATION_CLIP, APPLICATION_PSD, APPLICATION_KRITA } )
 
@@ -807,6 +808,7 @@ mime_enum_lookup = {
     'application/zip' : APPLICATION_ZIP,
     'application/vnd.rar' : APPLICATION_RAR,
     'application/x-7z-compressed' : APPLICATION_7Z,
+    'application/gzip': APPLICATION_GZIP,
     'application/json' : APPLICATION_JSON,
     'application/cbor': APPLICATION_CBOR,
     'application/hydrus-encrypted-zip' : APPLICATION_HYDRUS_ENCRYPTED_ZIP,
@@ -866,6 +868,7 @@ mime_string_lookup = {
     APPLICATION_ZIP : 'zip',
     APPLICATION_RAR : 'rar',
     APPLICATION_7Z : '7z',
+    APPLICATION_GZIP: 'gzip',
     APPLICATION_WINDOWS_EXE : 'windows exe',
     APPLICATION_HYDRUS_ENCRYPTED_ZIP : 'application/hydrus-encrypted-zip',
     APPLICATION_HYDRUS_UPDATE_CONTENT : 'application/hydrus-update-content',
@@ -929,6 +932,7 @@ mime_mimetype_string_lookup = {
     APPLICATION_ZIP : 'application/zip',
     APPLICATION_RAR : 'application/vnd.rar',
     APPLICATION_7Z : 'application/x-7z-compressed',
+    APPLICATION_GZIP: 'application/gzip',
     APPLICATION_WINDOWS_EXE : 'application/octet-stream',
     APPLICATION_HYDRUS_ENCRYPTED_ZIP : 'application/hydrus-encrypted-zip',
     APPLICATION_HYDRUS_UPDATE_CONTENT : 'application/hydrus-update-content',
@@ -992,6 +996,7 @@ mime_ext_lookup = {
     APPLICATION_ZIP : '.zip',
     APPLICATION_RAR : '.rar',
     APPLICATION_7Z : '.7z',
+    APPLICATION_GZIP: '.gz',
     APPLICATION_WINDOWS_EXE : '.exe',
     APPLICATION_HYDRUS_ENCRYPTED_ZIP : '.zip.encrypted',
     APPLICATION_HYDRUS_UPDATE_CONTENT : '',
diff --git a/hydrus/core/HydrusFileHandling.py b/hydrus/core/HydrusFileHandling.py
index 60b6fa25..632ac958 100644
--- a/hydrus/core/HydrusFileHandling.py
+++ b/hydrus/core/HydrusFileHandling.py
@@ -89,6 +89,7 @@ headers_and_mime.extend( [
     ( ( ( 0, b'7z\xBC\xAF\x27\x1C' ), ), HC.APPLICATION_7Z ),
     ( ( ( 0, b'\x52\x61\x72\x21\x1A\x07\x00' ), ), HC.APPLICATION_RAR ),
     ( ( ( 0, b'\x52\x61\x72\x21\x1A\x07\x01\x00' ), ), HC.APPLICATION_RAR ),
+    ( ( ( 0, b'\x1f\x8b' ), ), HC.APPLICATION_GZIP ),
     ( ( ( 0, b'hydrus encrypted zip' ), ), HC.APPLICATION_HYDRUS_ENCRYPTED_ZIP ),
     ( ( ( 4, b'ftypmp4' ), ), HC.UNDETERMINED_MP4 ),
     ( ( ( 4, b'ftypisom' ), ), HC.UNDETERMINED_MP4 ),