According to the provided information and pictures, it seems that you want to export the text orientation the way it is displayed in the grid. However, currently, this is not supported by GridViewSpreadExport. This is why I have logged a feature request in our Feedback portal by creating a public thread on your behalf. You can track its progress, vote for it, subscribe for status changes, and add your comments on the following link - feedback item. The more vore an item gathers the higher its priority becomes.
I have also updated your Telerik Points.
Make sure that you follow the item in order to get notified when its status has changed.
I hope this information helps. Let me know if you have other questions.
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