atarashii mise ga dekiru to, sugu gyouretsu ga dekirukoto ga arimasu.

It is the same basic verb, but the natural English meaning changes with the noun it goes with.

• 店ができる = a shop opens / a shop is established
• 行列ができる = a line forms / a queue appears

The core idea of できる here is to come into existence / to be formed.

So in this sentence:

• 新しい店ができる = when a new shop opens
• 行列ができる = a line forms

Japanese often uses one verb in places where English uses several different verbs.

Here, と is a conditional that means something like:

• when
• whenever
• if that happens, then...

So:

• 新しい店ができると、すぐ行列ができることがあります。 = When a new shop opens, sometimes a line forms right away.

This と often suggests a natural or typical result that follows automatically from the first part.

It is not exactly the same as every English if. It often sounds like:

• whenever X happens, Y tends to happen