Well, this is almost certainly going to be the first 14 numbers, those who didnt take part last season will be occupying numbers 15 onwards. Previously its been based on the previous seasons standings, i see no reason why it wouldnt continue for this year, so based on last years results and those taking part in the GT1 class, the numbers would be...
1) Cyber Racing
2) SK Gaming
3) Mercury Racing Team
4) F1RST Racing
5) GRENTIS Racing Team
6) pod - virtual racing
7) ID Racing
8) masterblasters e.V.
9) n!faculty
10) Pedal To The Metal
11) Clownpaint
12) Zwarte Wind Racing
13) iNf!N!tY*Skills
14) Scirocco Players
If HiFid has changed name since last season and is entered then they'd be 9th and the others dropped down a number etc
A couple of teams which have switched to a GT2 car would also have been in there too, but i've excluded them as i'd imagine the GT1 cars will carry 1-19 (or however many there are) and GT2 carry 20-32 etc
Thats my guess anyway, probably those i've not listed will be numbered in alphabetical order from where i've left it.