Can't stretch grid layout content

Here is screenshot of what I have now And this is the screen that I want I need to stretch LinerLayouts (first name and second name fields) for full equals space, but I couldn't do it. I tried to use different stretchMode for GridLayout, but this has no effect. How can I do it? Here is the part of my code with GridLayout:

<GridLayout
                android:layout_marginLeft="32dp"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:stretchMode="spacingWidth"
                android:layout_column="1"
                android:layout_row="0"
                android:layout_columnWeight="1"
                android:columnCount="2">

                <LinearLayout
                    android:layout_height="wrap_content"
                    android:layout_width="wrap_content"
                    android:orientation="vertical"
                    android:layout_row="0"
                    android:layout_column="0"
                    android:weightSum="1">

                <TextView
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content"
                    android:textAppearance="?android:attr/textAppearanceMedium"
                    android:text="@string/name"
                    android:id="@+id/txtName"/>

                <EditText
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content"
                    android:textAppearance="?android:attr/textAppearanceLarge"
                    android:textColor="@color/textColorSecondary"
                    android:id="@+id/vName"
                    android:textSize="17sp"/>

                </LinearLayout>

                <LinearLayout
                    android:layout_height="wrap_content"
                    android:layout_width="wrap_content"
                    android:orientation="vertical"
                    android:layout_row="0"
                    android:layout_column="1"
                    android:weightSum="1">

                <TextView
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content"
                    android:textAppearance="?android:attr/textAppearanceMedium"

                    android:text="@string/surname"
                    android:id="@+id/txtSurname"/>


                <EditText
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content"
                    android:textAppearance="?android:attr/textAppearanceLarge"
                    android:textColor="@color/textColorSecondary"
                    android:id="@+id/vSurname"
                    android:textSize="17sp"/>

                </LinearLayout>



            </GridLayout>