Price is 85% lowered compared to the last time GL was on chest even.

1. 8
2. 48
3. 88
4. 188
5. 388
6. 888
7. 1688
8. 2488
9. 3288
10. 4088
11. 4888
12. 5888

Price per 1x DNA: 24,000 credits.
Total price for GL: 48,000 credits.

Last event GL was 28k per DNA and 56k in total, now he is 48k in total. That's about 85% of the last price as T4F said.
There are some bonuses for open 3, 6 and 8 chests and some other bonuses for getting 1 DNA and composing the ship.
For bonus details, please head to event section.