The answer to your question is "yes." In other words, last I heard a Floyd Rose is Fender-spaced, so you'd need Fender-spaced pickups. (Or not. Back in the day, EVH tilted his bridge pickup to compensate for the bridge spacing.)
Now I have a couple of questions:
1. Doesn't the Jem come with factory-installed DiMarzio pickups?
2. Why replace the Edge Pro with a FR Pro?
3. Is this really an Ibanez Jem?
4. How many is a couple?
Answers:
Q. 1. Doesn't the JEM come with factory-installed DiMarzio pickups? Yes it does. But I forgot to mention this is a custom JEM. Oops
Q. 2. Why replace the Edge Pro with a FR Pro? Floyd Rose Pro (what I've read off this forum) stays in tune better. Plus (what I've read) FR lasts longer, and is better made. Just what I've read.
Q. 3. Is this really an Ibanez JEM? No It's Custom