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Does Google Fiber (GFiber) give you a public IP? (CGNAT and servers)

Short answer: Yes. GFiber's own help center calls the router's WAN address "your router's external public address", so there's no CGNAT to work around. Its residential terms allow personal, non-commercial servers. Static IPs are for business customers only.

Does Google Fiber use CGNAT?

No, per GFiber's help center, which describes the router WAN IP as the external public address GFiber assigns. That's an official statement, so this is high confidence. Sources are on the Google Fiber ISP page.

Static IP on Google Fiber

Home plans: GFiber's support page says static IPs are available exclusively for business customers. Business: its business pricing page says Business 2 Gig ($250/mo) includes one static IP; add-on block prices aren't published there. The home address is dynamic but public, so port forwarding works without one. See the static IP price comparison.

Terms, ports and IPv6

• Servers: allowed for personal use. GFiber's residential acceptable use policy bans only servers run for commercial purposes and names multiplayer gaming, video conferencing and home security as acceptable uses.
• IPv6: supported but optional, per GFiber's support page.
• Upload: symmetrical (up to 1 Gbps upload on the 1 Gig plan).
• Ports 25/80/443: not verified yet. If you've tested them, send a report.

How to confirm on your line

1. Follow how to tell if you're behind CGNAT: compare the router's WAN IP with your public IP.
2. Run the checker. Its port test checks a forwarded port from outside, and the report sums up what you can host.

More detail and sources: Does Google Fiber use CGNAT? · Can I self-host on Google Fiber? · ISPs without CGNAT

This site sticks to ISP facts. It doesn't review or recommend third-party products or services. Based on the ISP's own pages; policies change.