So, I haven't done anything with this community in ages, but I have a reason for that, and that reason is osu! But anyway, if I were to do a run on the 1.9 GDPS server, would it still stand? On the server, the game is reverted back to 1.9, but that's about it. Nothing else has changed. So, can I use it?

I think you can use it since it doesnt really change anything to the gameplay.

The moderators and myself discussed this about 2 weeks ago and we came to the conclusion that you can’t. Some speed skips are possible in 1.9 that aren’t possible in the current version.