No. A common hypothetical pattern uses the imperfect subjunctive in the si clause and the conditional in the result clause. The two halves perform different jobs, so matching their endings is not the goal. Identify the imagined condition first, then state its consequence. Learn this pattern with a complete example and avoid extending it unchanged to real conditions or to situations contrary to past facts.
With gustar, the thing liked is the grammatical subject. A singular thing normally takes gusta, while plural things take gustan; me identifies the person experiencing the liking. Do not select the verb ending from the English subject I. Find what is being liked first, then check its number. This viewpoint also helps you understand similar Spanish verbs that describe interest or personal reactions.
If the thing liked is already clear, a simple me gusta can express I like it. The thing is the subject in the Spanish construction, so a direct-object lo is not the equivalent of English it here. Keep the noun in mind when choosing singular or plural agreement. When you need to point explicitly to something, a suitable demonstrative can identify the subject instead.