Datagridview - checkbox show as yes or no

I think the easiest way is to change the source to output Yes/No instead of true/false. But, if that not doable, you also can write code to manipulate the DataTable(I'm assuming table = DataTable). Here is an example, is not type safe, but you can enhance it. The below function will change the column boolean type to string and its value to Yes/No.

Public Shared Function ChangeColumnDataType(ByRef table As DataTable, columnname As String, newtype As Type) As Boolean
    If table.Columns.Contains(columnname) = False Then
        Return False
    End If

    Dim column As DataColumn = table.Columns(columnname)
    If column.DataType = newtype Then
        Return True
    End If

    Try
        Dim newcolumn As New DataColumn("temporary", newtype)
        table.Columns.Add(newcolumn)
        For Each row As DataRow In table.Rows
            Try
                row("temporary") = Convert.ChangeType(row(columnname), newtype)
                row("temporary") = If(CBool(row(columnname)), "Yes", "No")
            Catch
            End Try
        Next
        table.Columns.Remove(columnname)
        newcolumn.ColumnName = columnname
    Catch generatedExceptionName As Exception
        Return False
    End Try

    Return True
End Function

Then call the ChangeColumnDataType function before the DataSource binding. I'm assuming the column name is "Active"

ChangeColumnDataType(table, "Active", GetType(String))
DataGridView1.DataSource = table

Source:
c# - Changing populated DataTable column data types - Stack Overflow[^]