Gibraltar is about 227,900 times smaller than Alaska.

Alaska is approximately 1,481,348 sq km, while Gibraltar is approximately 7 sq km, making Gibraltar 0.0% the size of Alaska. Meanwhile, the population of Alaska is ~710,231 people (680,658 fewer people live in Gibraltar).
Tip: This to-scale comparison of Alaska vs. Gibraltar uses the Mercator projection, which distorts the size of regions near the poles.