The developers announced that every subscriber GTA+ can receive an additional GTA$300,000 in GTA Online.
To do this you need to go to official site and in the Exclusive Offer frame, click the Claim Now button, and then follow the instructions. This needs to be done until 7 am (Kyiv time) October 10 (Tuesday). Transferring funds to your bank account may take up to 3 days (72 hours).
Source: gta.com.ua