Gabon is around the same size as Wyoming.

Wyoming is approximately 251,489 sq km, while Gabon is approximately 267,667 sq km, making Gabon 6% larger than Wyoming. Meanwhile, the population of Wyoming is ~563,626 people (1.8 million more people live in Gabon).
Tip: This to-scale comparison of Wyoming vs. Gabon uses the Mercator projection, which distorts the size of regions near the poles.