If you go to Florida's east coast, you eventually hit Cape Canaveral. Whether Leonida includes a space-launch analogue is genuinely speculative - we hedge accordingly.
What we know
Nothing confirmed. Trailer aerials don't clearly show a launch-pad-coded location. Speculation is community-driven.
Why it's interesting if it exists
GTA San Andreas had Easter Basin and the Aircraft Carrier; a space-coded location would be a big content piece. Story missions, set pieces, possible aerospace gameplay.
Whether Rockstar would commit to that level of fictional infrastructure is a real question. They might or might not.