So you would have to build it yourself at the moment.
Built a gtk3 version myself using https://download.geany.org/geany-1.37.1.tar.gz, https://wiki.geany.org/howtos/win32/msys2 (with few adjustments to fix configure errors) and my home machine.
Outcome: **absolutely no difference** :( Identical behaviour and time … as described [before](#issuecomment-759335428).
``` 21:00:33: Geany INFO : Using TCP port number 45937 for IPC 21:00:33: Geany INFO : Geany 1.37.1, German_Germany.1252 21:00:33: Geany INFO : GTK 3.24.24, GLib 2.66.4 21:00:33: Geany INFO : OS: Windows 10 1909 21:00:33: Geany INFO : System data dir: C:\geany\data 21:00:33: Geany INFO : User config dir: C:\Users\lupus\AppData\Roaming\geany 21:00:33: GLib-GIO DEBUG : _g_io_module_get_default: Found default implementation winhttp (GWinHttpVfs) for ‘gio-vfs’ 21:00:33: Geany INFO : Loaded GTK+ CSS theme 'C:\geany\data\geany.css' 21:00:33: Geany INFO : Loaded GTK+ CSS theme 'C:\geany\data\geany-3.20.css' 21:00:33: Geany INFO : System plugin path: C:\geany\lib\geany 21:00:33: Geany INFO : Added filetype Arduino (63). 21:00:33: Geany INFO : Added filetype Clojure (64). 21:00:33: Geany INFO : Added filetype CUDA (65). 21:00:33: Geany INFO : Added filetype Cython (66). 21:00:33: Geany INFO : Added filetype Genie (67). 21:00:33: Geany INFO : Added filetype Graphviz (68). 21:00:33: Geany INFO : Added filetype Groovy (69). 21:00:33: Geany INFO : Added filetype JSON (70). 21:00:33: Geany INFO : Added filetype Kotlin (71). 21:00:33: Geany INFO : Added filetype Nim (72). 21:00:33: Geany INFO : Added filetype Scala (73). 21:00:33: Geany INFO : Added filetype Swift (74). 21:00:33: Geany INFO : Added filetype TypeScript (75). 21:00:33: Geany INFO : Added filetype AutoHotkey (76). 21:00:34: Geany INFO : unknown : None (UTF-8) ```