With this specific wording, order should not matter. A reasonable assumption is that the probability of either girl or boy is 0.5 If you solve it with order by mistake, you can just multiply the answer by 3 (since there are three arrangements GGB, GBG, BGG)
CAT-holics 
A family has three kids. What is the probability that there are 2 girls and 1 boy ? Does the order matter in this case ?
With this specific wording, order should not matter. A reasonable assumption is that the probability of either girl or boy is 0.5 If you solve it with order by mistake, you can just multiply the answer by 3 (since there are three arrangements GGB, GBG, BGG)
regards
J