...something that has lots of control and spin
I tried it and didn't find control and spin to be the strongest points of this blade. First and foremost it's a fast offensive blade with flat trajectory and rather short dwell. It felt like a blade for an advanced, fast and very aggressive player.
GA8 is also a tenacious offensive rubber, it has good control for a tensor since it has a kind of a speed cap and keeps its' composure in high gear, but it is still a German tensor, very fast and bouncy. I used it for a year with an Acoustic and liked it a lot, it was fun to play, but the short game with GA8 is not the best and you will be prompted to attack serves and lift every long backspin, otherwise this combo doesn't make much sense.
So if you're confident with this offensive game, it could be a great weapon for you, but "lots of control" is definitely not about GA8 or H301/GA8 combo. You will need to be advanced enough where control is not your main concern.
I don't know your level, but if you'll find yourself overshooting and struggling with the short game in matches, then you might as well try Rakza Z, which does have LOTS of control and spin compared to GA8.