Import Customer Group Price for Product using CSV in Magento

Hi,

Please use the below Github link to Download the Extension and install to your Magento site.

Once after installing, you will see the import option System > Import/Export > Import - Custom.

https://github.com/ryaan-anthony/import-group-prices 

Handle Special Characters exporting Data in CSV

Please use below code before fputcsv function

$df = fopen($filepath, 'w');
fprintf($df, chr(0xEF).chr(0xBB).chr(0xBF));