When you were born God began working in your life making you who you are today. It was only when you became a believer that God also gave you the gift of the Holy Spirit.
There are many ways to identify your spiritual gifts. You can take specialised inventories or questionnaires, read books, and listen to speakers talk about gifts. Each can be profitable, but the best way to identify your gifts is experience. Many don't know what their gift is because they have never tried to do anything. Identifying your gifts will also be much easier when you take the rest of your SHAPE in to account!
As we open more of ourselves to God we will see the Fruits of the Spirit (Galatians 5:22-23) growing in us and we will receive the Gifts of the Holy Spirit (1 Corinthians 12, 1 Corinthians 14).
God has been shaping you for ministry since you were born. In fact, God started uniquely shaping you even before you were born! Psalm 139:14-16.
God has shaped your life and made you who you are, therefore, He wants to use all of who you are, to build up the body of believers, to serve others, and glorify Himself.
The truth is, although whatever gift you have is very special and very rare, you have even more to offer than that. He wants you to use your whole SHAPE to accomplish His will in your life!