Hi Ajaypokharkar
There is few solutions for you, check this points:
1) Use TestComplete 'text-recognition' option. With this option on You can search for any element currently visible on screen. For example if you have 5 rows in your grid and with third row you have a text 'document1' then you can search for this text as TextObject and read its properties.
https://support.smartbear.com/testcomplete/docs/testing-with/object-identification/text-recognition/index.html
2) Second solution its to deploy application in 'Debug mode', after that you can natively read grid properties like:
readSecondRowInSecondColumn() (method name its fake ;))
3) Third the most weird one is to read all property values by its 'Top' coordinates. For example the third row is always in the same line so it's Top coordinates will be for example 50 px. With this knowledge you can read all data in all columns for single row.
Hope this helps you.