Hey, there. So yeah, when you install GitKraken from the third-party menu, nothing gets created in the main menu. You have to start it from terminal with "gitkraken".
Running Solus 1.2.1 64-bit, fully updated just this morning.
Also, oddly, after uninstall, I can't seem to find it by search in the package manager - it's there in the Third Party menu, but not in the normal searching repository like other things are.
EDIT: OK, never mind on that second point, I guess some things just aren't in the search.