Does Yordle Explorer make you draw a card when you cast Called Shot with Repeat?

No, Yordle Explorer will not trigger when you play Called Shot, even if you pay the Repeat cost.

According to the official FAQs regarding Yordle Explorer:

• Yordle Explorer only checks the printed Power cost of a card (the number of Power symbols in the upper left corner).
• Additional costs, such as those from the Repeat or Accelerate keywords, are not included in this check.

Since Called Shot has a printed Power cost of 1, it does not satisfy the "2 Power or more" requirement for Yordle Explorer's draw trigger, regardless of whether you pay the additional Repeat cost.