Anyone here know if ssr guaranteed gacha is 1 time pull or you can pull as much as you want?

It's a 1 time 30 Paid SQ pull.

A few months back, in July I think, there were two special paid summons(Lancer Saber & Archer, and the other was Rider Assassin and Caster, plus Berserker and extra classes) that guaranteed you a 5 star servant from one of the classes in that banner. You could only pull it once, and it only counted paid quartz, which meant spending about $40, if I remember correctly. So if the upcoming guaranteed summon is anything like that, then you'll probably only be able to do on.

Next paid gacha is class based. You can only choose 1 class. It's either on Thanksgiving or New Year.

I wish I could pull as much as I want lol. But yeah, I cannot wait for the GSSR so I am hoping it's on Thanksgiving. I am rolling on the assassin banner, I would love a Jack.

Note that limited SSRs will not be part of the gacha.